It doesn’t. They’re separate eyepieces. I suggested the zoom with the 20mm so you had an idea of the difference between the 20mm on the zoom and a comparable quality stand alone Eyepiece (EP)
Thisis a 32mm 1.5 diameter eyepiece that’s showing up as Prime w free returns. And will get you a more zoomed out view at a lower magnification than is possible with the zoom, but you won’t be able to draw a comparison as the zoom probably only goes from 7-20 or 9-25